A prioritization protocol for coastal wetland restoration on Molokaʻi, Hawaiʻi

Frontiers in Environmental Science, Год журнала: 2023, Номер 11

Опубликована: Июль 11, 2023

Hawaiian coastal wetlands provide important habitat for federally endangered waterbirds and socio-cultural resources Native Hawaiians. Currently, are degraded by development, sedimentation, invasive species and, thus, require restoration. Little is known about their original structure function due to the large-scale alteration of lowland landscape since European contact. Here, we used 1) rapid field assessments hydrology, vegetation, soils, birds, 2) a comprehensive analysis bird value, 3) site spatial characteristics, 4) sea-level rise projections 2050 2100 wetland migration potential, 5) preferences community in GIS suitability prioritize restoration on island Molokaʻi. The first, our knowledge, incorporate preferences, criteria waterbirds, into prioritizing sites showed that groundwater ubiquitous water source wetlands. A groundwater-fed, freshwater herbaceous peatland or “coastal fen” not previously described Hawaiʻi was found adjacent coastline at being grow taro, staple crop In traditional ecological such agro-ecological system referred as loʻipūnāwai (spring pond). Overall, 39 plant were 12 sites; 26 these 11 native. Soil texture ranged from loamy sands silt silty clays mean % organic carbon content 10.93% ± 12.24 (sd). total, 79 13 coots (‘alae keʻokeʻo; Fulica alai ) 66 stilts (aeʻo; Himantopus mexicanus knudseni ), counted during assessments. consistently ranked three highest, Kaupapaloʻi o Kaʻamola, Kakahaiʻa National Wildlife Refuge, ʻŌhiʻapilo Pond, under different weighting approaches. Site prioritization represents both an actionable plan alternative protocol decision-making places where no pristine “reference” exist comparison.

Язык: Английский

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Trait‐independent habitat associations explain low co‐occurrence in native and exotic birds on a tropical volcanic island

Ecology and Evolution, Год журнала: 2023, Номер 13(7)

Опубликована: Июль 1, 2023

On oceanic islands, strong human impacts on habitats, combined with introductions of exotic species, modify the composition terrestrial bird assemblages and threaten their ecological functions. In La Réunion, an island located in Madagascan region, a national park was established 2007 to counter ecosystem-level effects three centuries habitat conversion, native species destruction introductions. Here, we investigated how were structured these human-modified landscapes, 10 years before set out its first conservation measures. We used combination multivariate statistics generalized additive models describe variations taxonomic functional diversity 372 local assemblages, encompassing 20 along gradients configuration. found that tied habitats while associated urban areas man-modified landscape mosaics, some overlap at mid-elevations. Species' trophic preferences segregated gradients, but traits had overall weak role explaining assemblages. Hence, time survey, Réunion formed two spatially distinct contrasting trait suites benefited from antagonistic compositions dynamics. conclude our results support analysis historical data sets establish reference points monitor insular ecosystems.

Язык: Английский

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Spectral index-based time series analysis of canopy resistance and resilience in a watershed under intermittent weather changes

Ecological Informatics, Год журнала: 2022, Номер 69, С. 101666 - 101666

Опубликована: Май 2, 2022

Язык: Английский

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Towards a holistic perspective on the development of island syndrome by examining its occurrence patterns in insular plants

Frontiers of Biogeography, Год журнала: 2023, Номер 15(3)

Опубликована: Авг. 25, 2023

The acquisition of evidence pertaining to island syndrome often relies on opportunistic observations, yet prior researchers have gradually compiled a body examples that collectively shed light its occurrence patterns and dynamics. Our comprehensive literature review revealed dominantly occurs in angiosperms oceanic islands, with notable abundance taxa exhibiting high endemism possessing functional traits associated facultative generalized biotic interactions. While acknowledging the influence unequal research interest sampling efforts observed patterns, deviations from prevailing biases evident global plant databases herbarium collections lend credence genuine differences syndrome. disproportionate incidence syndrome, delineated by taxonomic groups, traits, specific can be ascribed distinct biogeography islands presence idiosyncratic ecological evolutionary processes contribute development. Within an framework, our overarching hypothesis posits as transformative trajectory away diverse strategies adopted mainland plants alternative exhibited due their isolation simplicity. This perspective fosters more holistic perspective, encompassing myriad graded responses pressures encountered islands. Rather than dismissing biased we contend underlying insights hold substantial value formulating general, mechanistic model enhances understanding development implications.

Язык: Английский

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A test of island plant syndromes using resource‐use traits

Journal of Systematics and Evolution, Год журнала: 2023, Номер 62(2), С. 233 - 241

Опубликована: Окт. 29, 2023

Abstract Despite representing a fraction of the global terrestrial surface area, oceanic islands are disproportionately diverse in species, resulting from high rates endemicity. Island plants thought to share unique phenotype—referred as an island syndrome—which is be driven by convergent evolution response selection shared abiotic and biotic factors. One aspect plant syndrome that has received relatively little research focus expected have converged on conservative resource use associated with slow growth weak competitive abilities. Here we tested whether native, woody Hawaiian species phenotypically distinct—with more resource‐conservative leaf traits—compared globally distributed sample continental species. Using archipelago‐wide trait data set, detected average, native had lower nutrient concentrations overall, at mass per but no other phenotypic differences compared plants. There was also considerable overlap spaces Our findings indicate for traits not present flora, can demonstrate extensive variation their resource‐use strategies, scale comparable worldwide.

Язык: Английский

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